<template>
  <div>
    <nav-bar @click="titleClick">
      <div slot="left" class="back" @click="backClick">
        <img src="~assets/img/common/back.svg" alt="">
      </div>
      <div slot="center" class="title">
        <div  v-for="(item, index) in titles" :key="index" class="title-item" 
        :class="{active: index === currentIndex}"
        @click="titleClick(index)">{{item}}</div>
      </div>
    </nav-bar>
  </div>
</template>

<script>
import NavBar from 'components/common/navbar/NavBar'
export default {
  name: "DetailNavBar",
  components: {
    NavBar
  },
  data () {
    return {
      titles: ["商品", "参数", "评论", "推荐"],
      currentIndex: 0
    }
  },
  methods: {
    titleClick(index) {
      this.currentIndex = index
      this.$emit('titleClick', index)
    },
    backClick() {
    this.$router.back()
  }
  }
  
}

</script>
<style scoped>
.title {
  display: flex;
  font-size: 14px;
}
.title-item {
  flex: 1;
}
.active {
  color: var(--color-high-text);
}
.back img{
  margin-top: 11px;
}
</style>